Rotary engine.



No. 720,952.' PATENTBD PEB. 17, 190s.

gi. NIBLSEN. ROTARY ENGINE.

ArPLmumN. Hun Juni: so, 1902. no nonni.. Y 2 smazaTss-'smmm 1`w/TNESSES.' f :Nm/ENIGH A rma/vf rs.

we Poems Pzcns co. Puma-uwe. WASHINGTDN. me.

No. 720,952. f PATENTBDPBB. 17, l909.

H. NIELSBN.

. RQTARY ENGINE. Y

A'PLIGATION FILED JUNE 30, 1902. A

No MODEL. 2 SHEETS-SHEET 9.

1 By m4@ y V ATTORNEYS.

`Nieren STATES PATENT rri'ci.

HERMAN NIELSEN, OF BROOKLYN, NEWY YORK.

ROTARY ENGINE.'

SPECIFICATION forming part' 0f Letters Patent NO. 720,952, datedFebruary 17, 1903. Application filed June 30,1902. Serial No. 113,795.(No model.)

Engine, of which the followingis a full, clear,`

and exact description. y

The object of the invention is to provide av new and improved rotaryengine which is sin;d ple and durable in construction, very effective inoperation, and arranged to utilize the motive agent to the fullestadvantagato per-'f mit convenient reversing, and to allow of cuting oftthe steam at any desired point ot' the piston-stroke to use the steamexpansively.

The invention consists of novel features and parts and combinations ofthe same, as Will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings,

-\haust-port.

forming a part of this specitication, in which similar characters ofreference indicate corresponding' parts in all the views.

Figure l is a longitudinal sectional elevation of the improvement on theline l l of Fig. 3. Fig. 2 is a transverse section of the same on theline 2 2 of Fig. 3. Fig. 3 is a plan view of the same.V Fig. 4 is anenlarged end elevation of the AVstopping, starting, reversing, andcutoff lever. Fig. 5 is an eularged inverted plan view of thesteam-valve,

showing the ladmission-port5'and Fig isay plan view of the steam-valve,showing the ex- The improved rotary engine is mounted asuitably-constructed frame A, having ballbearings B, having acylindrical casing 0,'in which is mounted to rotate a Wheel D, havingits hub D' provided with a plurality of radially-disposed cylinders D2,D3, D, and D5, as plainly illustrated in Fig. 2. The Wheel D is arrangedeccentrically in the casing C, and in the several cylinders D2, D3, D4,and D5 are mounted to reciprocate the pistons E E E2 E3, having theirouter ends rounded off and in frictional contact with the inner surfaceof the rim of the cylindrical casing C, as plainly indicated in thedrawings. The hub D' of the Wheel D is secured on an annular bearing F',formed on a hollow shaft F, jour- Oilnaled on ballbearings B', carriedby the main frame A, eccentric to the ball-bearings B, as shown in Fig.l. One outer'end of the shaft F isthe inlet for the motiveagent and theother the outlet for the exhaust, andthe said inletend of the shaft Ftits into a head G, connected by a pipe H with a boiler or other sourceof motive-agent supply. The other end of the shaft F connects With ahead l, having an exhaust-pipe J for conducting the exhaust motive agentto the outside.

:Within the hollow shaft F is arranged a valve'K, formed with atransverse partition K', dividing the interior of the valve K into theinlet-compartment K2 and the outlet-compartment K3, the saidinlet-compartment K2 being in communication with the inlet end of theshaft F and the outlet-compartment K3 being in communication with theexhaust end of the shaft F. The inlet-compartment K2 is provided With aport b, adapted to register with ports a, formed in the shaft F and thehub D and leading into the cylinders E, E', E2, and E3, as plainly shownin Fig. 2, the said ports o, being also adapted to register with anexhaust-port c, likewise formed in the valve K, but leading into theoutlet-chamber K5.Y Oneend of the valve K is provided with avalve-stemK8, extending through a suitable stuffing-box in the head G, and outsidethereof on the outer end of this stem K8 is secured a lever K4, having ahorizontal eX- tension K5, reaching under the segmental iiange Gv2 onthe head G. (See Figs. l and 4.) The entensionK5 is provided withstop-collars K6 K7 to limit the longitudinal sliding Vmovement of theextension Kv5 necessary to bring the valve K in the desired cut-oftposition, as hereinafter more fully described.

By reference to Fig. 5 it will be seen that the admission-port l) in thevalve K is made in triangular shape, 'so that when the lever K4 is in aninnermost position and the collar K6 abuts on the flange G2, as shown inFig. l, then the base end of the said admission-port h is in registerwith one of the ports o., and consequently a large amount of steam canpass at a given time through the said ports b and a into thecorresponding cylinder. By moving the lever K4 outwardly the valve K ismoved in alike direction, and the base end of the admission-port h movesout of register IOO with a port a to cut off the steam from thecorresponding cylinder. The exhaust-port c in the valve K isrectangular, as plainly indicated in Fig. 6, so that a full exhaust ishad at all times from the cylinders at the time they move into anuppermost position and the ports ct register with the said port c.

The heads G and I are held stationary and are supported by suitable rodsG and I', respectively, from the frame A.

The operation is as follows: When the several parts are in the positionillustrated in the drawings, then the motive agent entering the shaft Fby way of the pipe I-I and head G passes into the compartment K2 andfrom the latter through the port b into the port ct of the cylinder D4,then in a vlowermost position-that is, the cylinder nearest the rim ofthe casing C. Now the steam passing into this cylinder D4 at the innerend thereof presses against the piston E2, so that the latter pressesagainst the rim of the casing C, and as the latter and the wheel D aremounted eccentrically one to the other it is evident that the force ofthe piston E2 on the rim of the casing C causes the latter to rotate andwith it the wheel D. From the foregoing it will be seen that the wheel Dand the casing C rotate together and in the same direction by the actionof the piston on the rim of the casing C. Now as the Wheel D rotates theport ct of the cylinder D4 nally moves out of register with the port b,so that the motive agent is cut off from this cylinder and the steamcontained therein acts expansively to continue therotary motion of boththe wheel D and the casing C. At about the time the port a of thecylinder D4 is cut off from the port b the port a of the next followingcylinder moves in register with the port b, so that live motive agentnow passes into this next cylinder to again apply an impulse to thecasing C and the wheel D in the manner above described relative to thecylinder D4 and its piston E2. The rotary motion of the wheel D finallybrings the port Ct of the first cylinder D4 in register with the port c,so that the steam can now escape from the cylinder D4, by way of itsport a, port c, and chamber K3, into the exhaust end of the shaft F tothe head I and exhaust-pipe .I to the outside. This Jfakes place at thetime the piston E2 moves into an uppermost position. It will be evidentthat by the operator turning the lever K4 the valve K can be turned inthe shaft F to bring the port b to one or the other side of the verticalplane extending through the axis of the shaft, so that the live steamcan be conducted into the next adjacent cylinder to insure rotation ofthe casing C and wheel D in either direction. In order to limit theturning movement of the shaft K4 for the purpose mentioned, I providethe ange G2 with stops G2 G4, adapted to be engaged by the extension K5,previously referred to and shown in Fig. 4. The extension K5 between thecollars K6 K7 is of such length relative to 'extending through the huband shaft to the the length of the admission-port b that when the leverK4 is pulled out until the collar K7 abuts against the flange G2, thenthe apex end of the port bis completely out of register with the port aof the cylinder then moving into working position. The motive agent isthus shut on? from the ports a and the engine comes to a standstill.When the lever K4 is in the position shown in full lines in Fig. 4, thenthe casing C and wheel D rotate in the direction of the arrow a', andwhen the lever K4 is swung to the position shown in dotted lines in thesaid Fig. 4:, then the casing C and the wheel D rotate in the inversedirection of the said arrow a.

I-Iaving thus described my invention, I claim as new and desire tosecure by Letters Patent- 1. A rotary engine comprising a cylindricalcasing mounted to turn, a wheel within said casing and having a hollowshaft mounted to turn eccentrically relative to the said casing, thesaid wheel having a plurality of cylinders disposed radially from thehub of the wheel, the inner ends of the cylinders having ports extendingthrough the hub and shaft to the inside of the latter, pistons in thesaid cylinders, acting on the rim of the cylinder-casing, and a valvemounted to slide and turn in the said hollow shaft, having compartmentsfor connecting with the said ports leading to the cylinders, one of thecompartments being connected with the Amotive-agent supply and the losother with the exhaust, the admission-port in the said valve beingtriangular, as set forth.

2. A rotary engine comprising a cylindrical casing mounted to turn, awheel within said casing and having a hollow shaft mounted to 105 turneccentrically relative to the said casing, the said wheel having aplurality of cylinders disposed radially from the hub of the wheel, theinner ends of the cylinders having ports extending through the hub andshaft to the 11o inside of the latter, pistons in the said cylinders,acting on the rim of the cylinder-casing,

a valve mounted to slide and turn in the said hollow shaft, havingcompartments for connecting with the said ports leading to the 115cylinders, one of the compartments being connected with the motive-agentsupply and the other with the exhaust, and a head on one end of the saidhollow shaft, connected withthe motive-agent supply, the said end of theshaft opening into the said admission-compartment of the said valve, asset forth.

3. A rotary engine comprising a cylindrical casing mounted to turn, awheel within said casing, havin gahollow shaft mounted to turneccentrically relative to the said casing, the said wheel having aplurality of cylinders disposed radially from the hub of the wheel, theinner ends of the cylinders having ports 13o inside of the latter,pistons in the said cylinders, acting on the rim of the cylinder-casing,a valve mounted to slide and turn in the said hollow shaft, said valvehaving compartments for connecting with the said ports leading to thecylinders, one of the compartments being connected with the motive-agentsupply and the other with the exhaust, and manually-controlled means forsliding and turning said valve in the shaft, for cutting off the motiveagent sooner or later, and for reversing the engine, as set forth.

ai. A rotary engine comprising a cylindrical casing mounted to turn, awheel mounted to turn eccentrically within the casing and having aplurality of cylinders disposed radially from the hub of the Wheel, ahollow shaft carrying the said wheel and having ports connecting withports in the inner ends of the cylinders, pistons mounted to slidewithin the said cylinders and in contact at their outer ends with theinner surface of the cylinder-casing, and a valve mounted to turn and toslide in the said hollow shaft to reverse the engine and to start andstop the same, the valve having an admission-compartment and anexhaust-compartment, provided with ports for connection with the shaftand cylinder-ports, as set forth.

5. A rotary engine comprisinga cylindrical casing mounted to turn, aWheel mounted to turn eccentrically Within the casing and having aplurality of cylinders disposed radially from the hub of the wheel, ahollow shaft carrying the said wheel and having ports connecting withthe ports in the inner ends of the cylinders, pistons mounted to slidewithin the said cylinders and in contact at their outer ends with theinner surface of the cylinder-casing, and a valve mounted to turn and toslide in the said hollovT shaft, the valve having anadmission-compartment and an exhaust-compartmenprovided with ports forconnection with the shaft and cylinderports, the admission-port in thesaid valve being triangular in shape, as set forth.

6. In a rotary engine, the combination with a cylindrical casing mountedto turn, awheel mounted to turn eccentrically in the casing and having aplurality of radially-disposed cylinders, pistons in the cylinders andengaging the casing, and a hollow shaft carrying the wheel and havingports connecting with the ports of the cylinders, of a compartmentvalvemounted to slide and turn in the shaft, each compartment of the valvebeing provided with a port, means connected with the valve for turningand sliding the same, means for limiting the sliding movement of thevalve, and means for limiting the turning movement of said valve, as setforth.

7. In a rotary engine, the combination with a revoluble casing, aplurality of revoluble cylinders eccentrically mounted in the casing,pistons in the cylinders and engaging the casing, and a hollow shaftupon which the wheels are mounted, of a compartment-valve mounted toslide in the shaft, each compartment being provided with a port, one-ofthe ports being triangular, and means for sliding said valve, as setforth.

8. In a rotary engine, the combination with a revoluble casing, aplurality of revoluble cylinders eccentrically mounted in the casing,pistons in the cylinders and engaging the casing, and a hollow shaftcarrying the cylinders, of a compartment-valve mounted to slide in theshaft, each compartment being provided with a port, a handle connectedwith.

the valveand provided with a horizontal extension having spaced stops,and a projection with which .the stops of the extension are adapted toalternately engage, as set forth.

9. In a rotary engine, the combination with a revoluble casing, aplurality of movable cylinders eccentrically mounted in the casing,pistons in the cylinders and engaging the casing, and a hollow shaftcarrying the cylinders and provided with ports, of a hollow valvemounted to slide and turn in the shaft and provided with compartments,each compartment of the valve being provided with a port, a handleconnected with the valve and provided with a horizontal extension havingspaced stops, and a flange at one end of the shaft and with which thesaid stops are adapted to alternately engage, lsaid flange beingprovided with oppositely projecting stops with which the extension ofthe handle is adapted to engage, as set forth.

In testimony whereof I have signed my name to this speciiication in thepresence of two subscribing Witnesses.

HERMAN NIELSEN.

